The bead-blasted knives that stained or rusted (slightly spotted)were the:
EDI Genesis I
MOD Trident
Benchmade Stryker
Maybe this will help with the analysis of the steel, hardness and peening method.
Damn, I sure learn alot here.
BTW, why won't my Spyderco Mini-Police neclace rust ? It lives in probably the most hostile environment I can produce (perspiration,showers,soap and neglect).
Bill